Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

In the image below, can you find the value of an angle(y)

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

what does the below rebus means?

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

Can you count the number of matches in the picture below ?

Prove that the below maths equation is true.

8 + 8 = 91

I always drive my customer away.

Who am I?